There are several common causes for a computer that continuously restarts. Here are a few methods you can try to troubleshoot the issue:

Method 1: Eliminate External Device Conflicts

• Unplug all peripheral devices connected to your computer (such as your mouse, keyboard, USB hubs, external monitors, printers, etc.).
• Check if the computer still restarts with only the essential components connected. If it stops restarting, one of your external devices might be causing the conflict. Reconnect them one by one to identify the problematic device. 

Method 2: Check the Memory Module (RAM)

• A loose or faulty memory module can cause system instability, including restarts.
• Carefully remove the memory module(s) from their slots.
• Gently wipe the gold contacts (gold fingers) on the bottom of the memory module with a clean, lint-free cloth or a rubber eraser.
• Reinstall the memory module(s) firmly into their slots, ensuring they are properly seated.
• If you have multiple memory modules, try booting with only one at a time to isolate a potentially faulty stick.

Method 3: Reinstall the Operating System

• System file corruption or software conflicts can often lead to unexpected restarts.
• As a last resort, consider reinstalling your operating system. This will eliminate any system-related issues that might be causing the restarts. (Note: This will erase all data on your system drive, so back up your important files beforehand.)

Method 4: Monitor CPU Temperature

• Excessive CPU temperature can cause a computer to shut down or restart to prevent damage.
• Monitor your CPU temperature to ensure it remains below 90°C. You can use third-party software tools to check CPU temperature.

If the temperature consistently exceeds 90°C, it indicates an overheating issue, which might be caused by a faulty fan, clogged heatsink, or dried thermal paste.